4 M; Ultra-pure 6n Ofhc Copper Center Conductor For Accurate Signal Transfer ; N2 Injected Dielectric Insulation;for Ultra-low Signal Loss ; Precision-machined Rca Connectors With Ultralink 24k Mil-spec Direct;gold-plated Contacts ; Double-shielded Construction;for Maximum Rejection Of Em;& Rf Interference ; 99.9999% Lab-grade Pure Copper; Retail Packaging